How to write array.valueForKey in Swift?

Question

What's the most convenient code to write

[results valueForKey:@"attribute"]

in swift? I've found here that it's recommended to use the map() function with a closure:

swiftarray.map({$0["attribute"]})

N.B. swiftarray is not a NSArray

Answer 1

I'am not sure but if you have some object in array other than Dictionary (or other type that supports subscripting), you will need to use following code

results.map({$0.attribute})